VEM VEMoDRIVE VSI 2.0 HD, Instruction Manual

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CG Drives & Automation, 01-5326-01r3b SSerial communication 69
10. Serial communication
The AC drive provides possibility for different types of serial
communication.
• Modbus RTU via RS232/485
• Fieldbuses as Profibus DP and DeviceNet
• Industrial Ethernet as Modbus/TCP, Profinet IO,
EtherCAT and EtherNet/IP
10.1 Modbus RTU
The AC drive has an asynchronous serial communication
interface behind the control panel. It is also possible to use
the isolated RS232/485 option board (if installed).
The protocol used for data exchange is based on the Modbus
RTU protocol, originally developed by Modicon.
The
physical connection is RS232. The AC drive acts as a slave
with address 1 in a master-slave configuration. The
communication is half-duplex. It has a standard non return
zero (NRZ) format.
The baud rate is fixed to 9600 (Control panel RS232 port).
The character frame format (always 11 bits) has:
• one start bit
• eight data bits
• two stop bits
• no parity
It is possible to temporarily connect a personal computer
with for example the software
7&. oSoftCom (programming
and monitoring software) to the RS232 connector on the
control panel. This can be useful when copying parameters
between AC drives etc. For permanent connection of a
personal computer you have to use one of the
communication option boards.
Fig. 75 RS232 connector behind the control panel
10.2 Parameter sets
Communication information for the different parameter
sets.
The different parameter sets in the AC drive have the
following DeviceNet instance numbers, Profibus slot/index
numbers, Profinet IO index and EtherCAT index numbers:
Parameter set A contains parameters 43001 to 43899. The
parameter sets B, C and D contains the same type of
information. For example parameter 43123 in parameter set
A contain the same type of information as 44123 in
parameter set B.
NOTE: This RS232 port is not isolated.
WARNING!
Correct and safe use of a RS232 connection
depends on the ground pins of both ports
being the same potential. Problems can
occur when connecting two ports of e.g. machinery and
computers where both ground pins are not the same
potential. This may cause hazardous ground loops that
can destroy the RS232 ports.
The RS232 connection behind the control panel is not
galvanically isolated.
The RS232/485 option board is galvanically isolated.
Note that the control panel RS232 connection can
safely be used in combination with commercial available
isolated USB to RS232 converters.
Param.
set
Modbus/
DeviceNet
Instance
number
Profibus
Slot/Index
Profinet IO
index
EtherCAT
index
(hex)
A
43001–
43899 168/160 to
172/38 19385 -
20283
4bb9 - 4f3b
B
44001–
44899 172/140 to
176/18 20385 -
21283
4fa1 - 5323
C
45001–
45899 176/120 to
179/253 21385 -
22283
5389 - 5706
D
46001–
46899 180/100 to
183/233 22385 -
23283
5771 - 5af3
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